Sideline: Private 2nd Number
Sideline: Private 2nd Number Summary
Sideline: Private 2nd Number is a free, with in-app purchases iOS app in Tools by Pinger, Inc.. Released in Aug 2015 (10 years ago). It has 14.6K ratings with a 4.36★ (good) average. Based on AppGoblin estimates, it reaches roughly 41.5K monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store last updated Jul 6, 2026
Recent activity: 10 new ratings this week View trends →
SDK intelligence: AppGoblin detected 4 development tools(e.g. OpenID), 2 ad networks, 2 analytics: product, 1 business tools,and 1 analytics: attribution integrated into Sideline: Private 2nd Number. View full SDK list →
Sideline: Private 2nd Number SDKs Summary
Sideline: Private 2nd Number was last scanned for SDKs on 2026-06-25. Below is the overview of third-party companies detected in the app. The full list of SDKs, permissions and unknowns is available here.
AppGoblin saw Sideline: Private 2nd Number uses 2 Ad Networks
Google
FacebookAppGoblin saw Sideline: Private 2nd Number uses 4 Development Tools
OpenID
Alamofire
nanopbAppGoblin saw Sideline: Private 2nd Number uses 2 Analytics: Product
Braze
FirebaseAppGoblin saw Sideline: Private 2nd Number uses 1 Business Tools
ZendeskAppGoblin saw Sideline: Private 2nd Number uses 1 Analytics: Attribution
Adjust4.36★
Ratings: 14.6K
Screenshots
App Description
Sideline gives you a second phone number for calling and texting—so you can stay connected without sharing your real number. Get the app today to keep your personal number private.
Whether you’re working, selling online, or just want more control over who can reach you, Sideline makes it easy to separate your personal communications from everything else.
Get a second phone number with an area code of your choice, send unlimited texts, and manage calls with powerful tools—all from one app. Sideline works over your carrier network (not VoIP), so your second number is just as reliable as your first.
Take control of your privacy and communication with Sideline.
WHY SIDELINE?
Protect Your Personal Number:
- Get a second phone number for private calling and texting
- Keep your real number separate and secure
- Choose a local area code (or an area code of your choice)
- Includes Caller ID and custom voicemail
- Reliable cellular calling (not VoIP)
Private Texting & Calling:
- Send unlimited SMS and MMS messages
- Use your second number for work, marketplace listings, or signups
- Call and text without revealing your personal number
- Access your number from multiple devices
Stay in Control:
- Auto-Reply sends instant responses when you miss a call
- Custom voicemail with message transcripts
- Port your existing number to Sideline
- Block unwanted callers and manage contacts
Smart Communication Tools:
- Save and reuse frequently sent texts
- Add notes to conversations and contacts
- Stay organized without mixing personal and business messages
USE SIDELINE FOR:
- Private texting and calling
- Work or business communications
- Online buying and selling (Craigslist, Facebook Marketplace, etc.)
- Any time you want to protect your personal number
FREQUENTLY ASKED QUESTIONS
- What is Sideline, and how does a second phone number work?
- Sideline is a second phone number app that lets you call and text from a separate number on your existing smartphone. Just download the Sideline app, and your Sideline number will work alongside your primary number, so you can keep personal and secondary communications separate without needing a second phone.
- Can I use Sideline for private texting and calling?
- Yes. Sideline is designed for private texting and calling, so you don’t have to share your personal phone number with strangers and businesses. Use your second number